One way to efficiently share presentations is to have students use screencasting tools to record and narrate their presentations, then publish those presentations in one place, like a Glog. This allows students to use class time to interact with the presentations...
Glogster is a great, engaging way to enhance presentation skills. It's "poster-like" nature forces users to be concise in the amount of text on their Glogster, allows viewers to learn visually and is a very constructivist tool.
A way for students to create presentations and share with their peers.